blocks



H. ACKERMANN PRESS FOR THE MANUFACTURE OF ARTIFICIAL STONES, BLOCKS,BRICKS, OR THE LIKE Filed March 17, 192'? 2 Sheets-She et 1 Dec. 13,1927.

H. ACKERMANN PRESS FOR THE MANUFACTURE ORARTIF'ICIAL STONES Jnvenior;

Patented Dec. 13, 1927.

n i 'r n. s re "re s earner errics.

HUGO ACKER'MANN, OF GODESBERGONTHE-RHINE, GERMANY.

rnnss non THE MANUFACTURE or ARTIFICIAL sronns, BLOCKS, BRICKS, on THLIKE.

Application filed March 17, 1927,.Serial No. 176,139, and in GermanyMarch 17, 1926.

without any loss of pressing mass filled in M the compartments of thecharging box.

Still another object of the invention is-to provide means whereby thefreshly pressed bricksd-espite their special cross section can. beremoved fromthe press by mechanical means without damage,

The proper filling by means of a charging box is effected according tothe invention by arranging on that part of the press table on which thecharging box moves, that is, in .front ofthe mould openings, ledges orrails the upper 'surface of which corresponds shape 'to theupper,surface of the lower dies.

. Inlth-e manufacture of wedge-shaped bricks .the-up per;lsurface. ofthewledges or rails is slanting corresponding-to the slanting uppersurface ofthe lower dies. In the manufac- 'ture of profiled bricks -theledges or rails are wprofiled in accordance with the particular profile.of the l-ower dies used at the time.

The rear and frontwalls of the charging box are provided with recessesinto which the slanting or profiled ledges or rails fit.

The proper removalof the pressed wedge! shaped or profiledbricksejectedfrom the v mould openings and resting onthe lower dies iseffected according to thepresentinvention by providing ledges or railsof corresponding shape on that side of the table L on, which the bricksareremoved or inother words behind the mould vopenings.

few applicationswhich relate both to the fmanufacture ofwedge-shaped asKwell as f. bricks of other profiles.

4 .Flg..;1 shows a. cross section through a press in whlchwed'ge-shapedbIlCkS'Wlih two '.inclinedfsurfacesare-made.i;

manufacture of wedge-shaped bricks. press table 1 is secured by thepillars 12 be- Fig. 2 is a plan of the press shown in .Fig. 1, wherebythe upper press dies are omitted.

Fig. 3 is a section through the charging box 1 n its position of restalong a line X/X 111 Fig. 2 on an enlarged scale.

Fig. 4 is, also on an enlarged scale, a sect on along a line Y/Y in Fig.2 through that side of the press table on which the finished pressedbricks are shoved oif.

Fig. 5 is a plan of a press table in which gulding ledges are onlyprovided on the fill mg slde, the finished pressed bricks being shovedoff on the level surface of the table.

Figs. 6-12 show various kinds of profiled bricks and the profiled guideledges-to be arranged on the press table for this purpose 1n accordancewith the invention.

Figures 1-4 apply to the arrangement of slanting table ledges asrequired for the The tween the upper press cylinder 2 and the lowerpress cyl nder 3. There are three mould opemngs 4 1n the press table 1.The charging box-5 has in like manner three compartments. Eachcompartment of the charging box 5-is filled with pressing mass asrequired for one brick. A cross-beam 7 is fastenedto the charing box bymeans of the bars 8, said cross beam, when the charging box is movedforward, driving the pressed bricks ejected from the mould openingsgllong before out of the range 'of the press 185; Y Both thelower dies 9and the upper dies 10 are provided with inclined heads in accordancewith the slanting surfaces above and below of each wedge-shaped brick 8to be made. p

In Fig. 1 the press is shown at the moment in which, after finishedpressing. the upper dies 10 have been withdrawn. 7 The Wedge shapedbricks 8 are still in the position in which they have just beencompressed on V p j' the press dies 9 and are about to be ejected Thedrawings illustrate theinvention by a.

from the mouldopenings by lifting the lower dies9 and then carried awayby the cross- I beam 7. 1 p

The ledges or rails 11 provided with slanting surfaces are arrangedonthe press table 1 before and behind the mould openings 4.

.The slant of the surfaces ofthe ledges or rails corresponds to theslant of the surfaces of the lower dies 9, so that the surface of eachledge 11 forms a plane with the surface of the corresponding lower diewhen the latter on ejecting the wedge-shaped brick 8 is moved into itsextren'ie upper position. Accordingly the wedge-shaped bricks 8, whenthe charging box is moved forward, can also he shoved along by thecross-beam 7 on the slanting ledges 11 behind the mould openings on thesideof removal without danger of disturbing the further pressingoperations.

The front and rear walls of the charging box 5 are provided below withrecesses (Fig. 3) in which the slanting ledges or rails 11 fit. Inmoving forward the charging box 5 to the mould openings 1 the pressingmass glides along on the slanting ledges 11 without disturbance until itarrives over the adjoining slanting surfaces of the lower dies 9. Thelatter are now sunk down, whereby the pressin mass resting thereonfollows, gliding out of the compartments of the charging box into themould openings beneath. This ensures a proper filling of the mouldopenings 1, whereby at the very beginning there is more pressing mass onthe broader side of the wedge-shaped bricks than on the narrow side.This distribution of the pressing mass in the mould opening ensures theproduction of wedge-shaped bricks which as a. result of the exactdistribution of the pressing mass throughout their entire cross sectionare compressed with absolute uniformity.

The press shown in Fig. 5 is intended for the manufacture of profiledbricks shown in side and plan in Figs. 10 and 11. Three mould openings4.- are. provided in the press table 1 for simultaneously pressing threebricks. The charging box 5 glides on the side of the table in front ofthe mould openings. There are three guide ledges or 'ails 11 fitted onthis part of the table surface in front of the three mould openings 4.The arched ledges 11 project through corresponding recesses in the wallsof the charging box 5, serving as its bottom. The pro file of the ledges11 will be seen at 16 in section in Fig. 10 and corresponds exactly tothe surface profile tobe used in this case, of

the lower dies moved up and down in the,

mould openings a No guideledges are provided in the example shown 111Fig. 5 on that side ofthe press table on which the finished pressedbricks are shoved off by the cross-beam 7 into the position indicated bydotted lines, seeing that the profiled brick shown in Figs. and 11possesses in itself a suliiciently large level resting surface, so thatit can be shovedoff directly over an even table surface.

Figs. 6 and. 7

a brick provided with groove 13 and tongue 14. In this case only narrowsemicircular ledges 11, the cross-section of which corresponds to thegroove, need beprovided as guide ledges on the press table in front ofthe mould openings.

The profiled brick shown in side view and plan in Figs. 8 and 9illustrates still another application of the invention. This brick iscut out at the point on the upper and lower side. In this case the guideledges 11 must correspond to the cutout on the lower side. Theadvantages of the present inven tion become particularly evident inconsidering the ridged brick shown in "front view in Fig. 12 which onaccount of the ridges on its upper and lower surface pre sents to view anumber of ribs 17 which require a ledge 11 of corresponding profile onthe press table 1.

The advantage gained by the arrangement of ledges with slanting orotherwise inclined profiled surface is that the pressing mass charge inthe chargingbox has already as sumed on its lower surface the profile ofthe brick to be pressed, is brought to the mould openings in this formand set unchanged on thelower dies. The shape of the pressing masscharge previously formed in this manner is also still retained when thecharge sinks into the mould openings by letting down the lower dies.

The profiled ledges arranged in accordance with the invention on thecharging side of the press table ensure not only an acceleration of thepressing operationsby the charging box operating in connection with theledges, but also a considerably improved compression and structure ofthe pressed bricks dueto the fact that the charge in the mould openingshas been given before'com pression a similar shape to that of thepressed bricks. This furt-her'ensures a uniformpressing efiect on theentire pressing mass. A

Fol-this reason the new press table will also be used for making brickswhich are only profiled on one surface and in cases where the brick canbe pressed with the side not profiled turned downward. Even such brickscan in future be pressed better with the profiled side turned downward,in order to ensure a uniform pressing effect by previously givingthe'pressing mass charge a form corresponding to the ultimate shape ofthe brick. V I

The ledges provided in accordance with the invention with slanting orprofiled surface and arranged on the press table behind the mouldopenings ensure the removal ofthe pressed bricks without danger ofinjury. The pressed bricks carried ofi by the charging box or thecross-beam connected with same slide conveniently along on the profiledshow in front and side viewledges adjoining with the surfacebf the loolower dies until they reach their places from which. they are taken off.The pressed bricks accordingly retain their horizontal position withouttilting during the course and, in the event of their having recesses intheir lower surfaces, are further supported by the profiled ledgescorresponding to these recesses.

The shoving off of the pressed bricks from the press is, accordingly,effected on a press table built along the lines set forth in theinvention, without alteration of shape and without injury to the bricks.

What I claim is:

1. A press for the manufacture of wedge shaped or otherwise profiledbricks, comprising upper and lower pressing dies, a press table providedwith a plurality of moulding openings and an equal number of guideledges or rails, arranged before the mould openings and corresponding inshape to the upper surface of the lower pressing dies and a. chargingbox having the front and rear wall formed with bottom edgescorresponding in shape to said ledges or rails.

moulding openings and an equal number of guide ledges or rails, arrangedbefore and behind the mould openings and corresponding in shape to theupper surfaces of the lower pressing dies and a charging box, shiftableon said ledges or rails.

3. A press for the manufacture of wedge shaped or otherwise profiledbricks, comprising upper and lower pressing dies, apress table providedwith a plurality of moulding openings and an equal number of guideledges or rails corresponding in shape to the upper surface of the lowerpressing dies and a charging box, shiftable on said ledges or rails andprovided with a cross-beam for removing the pressed bricks from themould openings.

In testimony whereof, I have signed my name to this specification atCologne, Germany, this 26th day of February, 1927.

HUGO ACKERMANN.

